Calcium

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Calcium
Chemical formula Ca
Atomic Number 20 
OTP appearance solid 
Molar Mass(g/mol) 40.1 
Melting Point(°C) 842 
Boiling Point(°C) 1484 
Density(g/cc) 1.55
NFPA 704
NFPA704.png
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3
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Elemental Calcium is rarely required. Normally it is used in a reduced state.

Uses

Justification Questioned

  • Many calcium compounds are used in this experiment

Natural occurrence

Production

Extraction

Electrolysis of calcium chloride

  1. Produce calcium chloride from calcium ores by combining them with hydrochloric acid
    CaCO3 + 2 HCl CaCl2 + H2O
  2. Electrolyze at 775°C, 100V
    CaCl2
    {
    775°C 100V}
    Ca + Cl2

From halides

  1. by halide stripping with sodium[1]
    CaI2 + 2 Na 2 NaI + Ca

See Also

References

  1. Mellor, Joseph William (1912) "Modern Inorganic Chemistry"
    Longmans, Green, and Co